linphone-iphone/Linphone/Utils/ShareSheetController.swift

/*
 * Copyright (c) 2010-2023 Belledonne Communications SARL.
 *
 * This file is part of linphone-iphone
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

import Foundation
import SwiftUI
import linphonesw

struct ShareSheet: UIViewControllerRepresentable {
	typealias Callback = (_ activityType: UIActivity.ActivityType?, _ completed: Bool, _ returnedItems: [Any]?, _ error: Error?) -> Void
    
    let friendToShare: Friend
	var activityItems: [Any] = []
	let applicationActivities: [UIActivity]? = nil
	let excludedActivityTypes: [UIActivity.ActivityType]? = nil
	let callback: Callback? = nil
	
	func makeUIViewController(context: Context) -> UIActivityViewController {
        let directoryURL = FileManager.default.urls(for: .cachesDirectory, in: .userDomainMask).first
        
        if directoryURL != nil {
            if friendToShare.name != nil {
                let filename = friendToShare.name!.replacingOccurrences(of: " ", with: "")
                
                let fileURL = directoryURL!
                    .appendingPathComponent(filename)
                    .appendingPathExtension("vcf")
                
                if friendToShare.vcard != nil {
                    try? friendToShare.vcard!.asVcard4String().write(to: fileURL, atomically: false, encoding: String.Encoding.utf8)
                    
                    let controller = UIActivityViewController(
                    activityItems: [fileURL],
                    applicationActivities: applicationActivities
                    )
                    controller.excludedActivityTypes = excludedActivityTypes
                    controller.completionWithItemsHandler = callback
                    return controller
                }
            }
        }
        
		let controller = UIActivityViewController(
			activityItems: activityItems,
			applicationActivities: applicationActivities)
		controller.excludedActivityTypes = excludedActivityTypes
		controller.completionWithItemsHandler = callback
		return controller
	}
	
	func updateUIViewController(_ uiViewController: UIActivityViewController, context: Context) {
		// nothing to do here
	}
    
    func shareContacts(friend: String) {
        
        let directoryURL = FileManager.default.urls(for: .cachesDirectory, in: .userDomainMask).first
        
        if directoryURL != nil {
            let filename = NSUUID().uuidString
            
            let fileURL = directoryURL!
                .appendingPathComponent(filename)
                .appendingPathExtension("vcf")
            
            try? friend.write(to: fileURL, atomically: false, encoding: String.Encoding.utf8)
        }
        
        /*
         let activityViewController = UIActivityViewController(
         activityItems: [fileURL],
         applicationActivities: nil
         )
         */
    }
}